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I just received my MSL (Master Subsidy Lock) code, to remove the carrier lock for my iPhone 4s. My contract expired 2 days ago. I called Sprint's customer service and got the run-around until I was forwarded to a supervisor. Metro Pcs Unlock Phone Policy.

The supervisor finally told me that I need to go to a Sprint company store with 2 forms of government id and scheduled an appointment for me. At the Sprint company store, I got the runaround for about 5 minutes. First the guy told me it is not possible, then he said that Sprint customer service sends customers in for requests that they can't fulfill, all the time. I was persistent, and when I used the key phrase MSL, the guys stopped pretending. He still said that he can't guarantee that my phone will work with another carrier.

Basically everything he could do, to discourage me and make me believe that it wouldn't work. But I got my MSL code. Mine is 6 digits.

It's probably a sequential number, so the number of digits will probably increase as the carrier has more phones. I also googled MSL and found this interesting article online, on how you can, in a round about manner, get Customer Service to give you, your MSL, as long as you don't mention the term MSL. Just indicate that you need help programming your phone. I'm actually just switching to Ting.com, a mvno, that resells Sprint service, for really cheap. It's very affordable for people, like me, make very few phone calls and mainly use wifi. I am also using Google Hangouts to make free phone calls, at least in the USA, so my number of voice phone calls I make, will further decrease.